Electric lamp



(No Model.)

L. SEXAUER.

ELECTRIC LAMP. A No. 256,746. Patented Apr.18,1882.

www @ya f A UNITED STATES PATENT Ormea.

LOUIS SEXAUER, OF BROOKLYN, NEWT YORK.

ELECTRIC LAMP.

SPECIFICATION forming part of Letters Patent Application filed January19, 1882.

To all whom tt may concern:

Be it known that I, LoUrs SEXAUER, acitizen ofthe UnitedStates,residingatBrooklyn, in the county of Kings and State ot' NewYork, haveA invented new and useful Improvements in Electric Lamps, ofwhich the following is a specification.

rlhis invention relates to improvements in electric lamps, and has forits object to improve the devices employed for feeding the carbons.

The invention will be tirst described in dctail, andthe improvementsafterward set forth in the claims.

In the accompanyingdrawings,Figure 1 represents a side view ot' myautomatic feeder for the upper carbon. Fig. 2 is a front view of thesame. Fig. 3 is a side view of my device for adjusting the lowercarbon.Fig. 4 isa plan or top view ofthe same.

Similar letters indicate corresponding parts.

In the drawings, the letter A designates the upper-carbon holder of anelectriclamp. Said carbon-holder is provided atits lowerend with asocket to receive the carbon stick B, and its upper portion extendsthrough between two roller-jaws, O D. The roller C is mounted on anarbor, a, which hasits bearing in thestandard E, and on which are alsomountedabrakewheel, F, and a drum, G. The roller D is mounted on anarbor, b, which has its bearings in boxes c, fitted into slotted arms dand exposed to the action of springs e, so that by the action of thesesprings the carbon-holder is rmly clamped between the two roller-jaws CD, and if these rollers are not permitted to revolve the carbon-holderis sustained and prevented from sinking down. The brake-wheel F is madeof iron, and with it is combined the governing electro-magnet I, thecore H of which is concave at its upper end to correspond to thecircumference ot' the brakewheel F.

The electro-magnet I is included in the circuit of the carbons, and ifthe carbons are at the proper distance apart the action of theelectro-magnet on its core is such that by the attraction of said corethe brake-wheel F is retained in position, and thereby the rollerjaws GD are prevented from revolving, thus retaining the carbon-holder A inposition; but

No. 256,746, dated April 18, 1882,

(No model.)

as the cal-bons are consumed, or whenever, from some other cause, theforce of the electric current through the helix of the electromagnetdecreases, the attractive force ot' the core H is reduced andthecarbon-holder sinks down. As the points of the carbons approach theforce ot' the electric current through the electro-magnet I is increasedand the downward motion of the carbon-holder is stopped. The distancebetween the coreH andthe roller F must be properly regulated, and forthis purpose the electro-magnet may be provided with suitable means-suchas a set-screw-for moving it toward and from said roller. I

The roller O is provided in its circumference with a spiral groove,f,which is intended to receive a cord, g, one end of which is fastcned tothe roller and the other end to the carbon-holder A. The object of thiscord is to prevent the carbon-holder from slipping down when theroller-jaws are stationary, or from continuing its downward motion afterthe motion of the roller-jaws has been arrested.

The lower carbon, J, is secured in a holder, K, which is secured byset-screws h in the armature-lever L ot' an electro-magnet, M, Figs. 3and 4. This electro-magnet is in the circuit of the carbons, and if thecarbons are at the proper distance apart the attractive force ot' theelectro-magnet is balanced by a spring, i, which acts on the lever L,and is so adjusted that it retains the armature N at a short distancefrom the ends of the cores of the electro-magnet, Fig. 3.

lf from some cause the upper carbon moves down so as to come in contactwith the lower carbon, the force of the electric current on theelectro-magnet M immediately increases, the armature N is attractedagainst the force of the spring t', and the lowercarbon is depressed torestore the proper distance between its point and that of the uppercarbon. As the carbons are consumed the attractive force of theelectro-magnetM is reduced and the arma ture-lever L recedes to itsnormal position. By these means the lower carbon isautomaticallyretained in the proper position in relation to the uppercarbon.

If the circuit through the lamp is broken, the upper carbon slides down,so as to comein contact with the lower carbon, and at the same IOC timethe lever L, together with the lower carbon, is forced up by the springz, carrying up the upper carbon a short distance. If the current throughthe lamp is restored, the armature L is attracted vagainst the force ofthe spring,` fi, the upper carbon is retained in position by theroller-clamps C D, and the lower carbon is moved down automatically vtothe proper distance to restore the electric arc.

I am awarethat itis not broadlynew tocontrol the movement of the uppercarbon in an electric lamp by means of rotary jaws and an electro-magnetor an electromotor; and l am also aware that itis not new to control theupper carbon by means of a vertically-movable brake-wheel connected withthe carbon-holder and raised and lowered and held or released by auelectro-magnet; but such features ot' themselves, or as4 broadly stated,do not constitute my invention.

I do not claim broadly in this application the combination of theroller-jaws anda brake operated by au electro-magnet for regulating thefeed ot' the upper carbon, such being the subject-matter of a priorapplication for a patent tiled by me December 28, 1881.

What I claim as new, and desire to secure by Letters Patent, is

1. In an electrielamp, the combination, substantially as hereindescribed, of asupportingstandard, two rotary jaws mounted on arborsarranged in said standard and serving,r to normally clamp and hold theupper carbon, and by their rotary movement permitting the carbon todescend, a cord attached tothe carbon holder and wound around one of therotary carbon holding` and releasing;` jaws, a brakewheel secured to thearbor ot' the rotary jaw, around which said cord is wound, andanelectro-magnet included in the circuit of the carbons, and having' acore arranged adjacent to the periphery ot' the brake-wheel, and by itsattraction serving to retain the latterin afxed position, essentially asand for the purpose described.

2. In an electric lamp, the combination, with a lower carbon and anelectro-magnet and armature for vertically adjusting the saine, of tworotary jaws mounted on arbors in a supporting-frame, and by their rotarymovement permitting the upper carbon to descend, a brake-wheel arrangedon the arbor of one of the rotary jaws, and an electromagnet ineluded inthe circuit of the carbons and having a core arranged adjacent to theperiphery ofthe brake-wheel, the current through which magnet causes itscore to attract the brake-wheel and prevent the rotation of the carbonholding and releasingjaws, essentially as and for the purposesdescribed.

3. In an electriclamp, the combination, with a vertically-adjuslablelower carbon, of two rotary jaws mounted on arbors in asupporting-frame, and serving to clamp and hold the upper carbon and bytheir rotary movement to permit the descent of the same, a cordconnected at one end with the upper carbon and at its other end woundaround one ot' the rotary jaws, an iron brake-wheel mounted on thc arborof one ot' the rotaryjaws, and a stationary electro-magnetincluded inthe circuit ot' the carbons and having a core arranged adjacent to theperiphery of the brake-wheel, the current through said magnet causingits core to attract and hold the brake-wheel until the currentdecreases, when the latter will be released and the rotary jawspermitted to revolve and feed the carbon downward, essentially as setforth.

In testimony whereof I have hereunto set my hand and seal in thepresence of two subscribing witnesses.

LOUIS SEXAUER.

Witnesses:

W. HAUFF, E. F. KAs'rnNHUBnR.

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